Use the rules of matrix multiplication to show that Eq. (14.3) is identical with Eqs. (14.1) and
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Use the rules of matrix multiplication to show that Eq. (14.3) is identical with Eqs. (14.1) and (14.2).
a11x + a12 y = c1, (14.1)
a21x + a22 y = c2. (14.2)
AX = C, (14.3)
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